ch 10

Why do plants perform photosynthesis?

• To produce oxygen for humans

• To convert sunlight into chemical energy

• To absorb water from the soil

• To grow taller

What is the primary purpose of photosynthesis?

• To produce oxygen

• To make sugar

• To absorb sunlight

• To release carbon dioxide

Which two substances are combined in photosynthesis to produce sugar?

• Oxygen and glucose

• Carbon dioxide and water

• Nitrogen and hydrogen

• Methane and oxygen

What happens to the energy level during photosynthesis?

• Energy level decreases

• Energy level remains constant

• Potential energy increases

• Potential energy decreases

What type of reactions are involved in the first step of the process?

• Light-Independent Reactions

• Dark Reactions

• Light-Dependent Reactions

• Calvin Cycle Reactions

What is produced during the light-capturing reactions?

• Sugars

• Oxygen and Chemical Energy (ATP, NADPH)

• Carbon Dioxide

• Water

What is the second step in the 2-step process?

• Capture sunlight and temporarily store that energy

• Use stored energy to make sugar

• Release oxygen into the atmosphere

• Convert ATP into ADP

Which cycle is involved in using stored energy to make sugar?

• Krebs Cycle

• Calvin Cycle

• Citric Acid Cycle

• Glycolysis

What do ATP and NADPH represent in the context of cellular energy?

• Types of currency

• Energy molecules

• Enzymes

• Vitamins

What is needed to absorb the energy contained in light?

• A pigment

• A mirror

• A lens

• A prism